Too big? Caremark, AdvancePCS getting close look from feds.
D016363:Antitrust Laws; D004345:Drug Industry; D006264:Health Benefit Plans, Employee; D007343:Insurance Carriers / Q000331:legislation & jurisprudence*; D007356:Insurance, Pharmaceutical Services / Q000191:economics / Q000331:legislation & jurisprudence*; D008329:Managed Care Programs; D009935:Organizational Affiliation / Q000331:legislation & jurisprudence*; D010593:Pharmaceutical Services / Q000191:economics / Q000458:organization & administration*; D014481:United States; D014485:United States Federal Trade Commission